There is 4k programming out there. However, for us with slow internet and no availability of anything faster coming, we have to hope that Dish makes available some 4k satellite delivered channels. Why build a 4k Hopper and Joey and then only deliver streaming 4k. It is cheaper to get Netflix and Amazon Prime for those with ample internet speeds. 4k BluRay players are coming also to help avoid the Satellite and Cable networks who do not deliver 4k. Now we read that Direct TV has a dedicated 4k 7.1 audio satellite delivered channel and will broadcast the Masters on it. So again the Dish HW side is at the state of the art and the programming delivery side is behind the curve. Direct TV also had 3D channels until that faded away. They try to be state of the art . Dish programming just flounders to be mundane.
I am one also that cannot get fast enough internet only 6MB Down,but sometimes I can get the Ultraflix 4K Moving Murals to work in 4K.
All the 4K UHDTVs upconvert the signal it receives,I have a cheap Vizio and the 1080i 4K upconversion looks very good on Dish.
There are also 4K upconverting Bluray players I got the Sony BDP S6500 and it makes my 1080p Bluray movies look awesome.